Hello All, Anyone have a chance to drive or test a GM 3.0l Inline 6 Diesel Engine Yet... I am Thinking of Buying on For My Personal Vehicle, I Have Been a Die Hard 6.6l Diesel Guy... The Mileage looks Good, A Friend Has a 2021 And Is getting 28-29 mpg average on I-75 at 75 MPH.... Any information from owners is appreciated... Thanks Hoggy1